They are two of the most glamorous of Europe's royals and today was no exception for the Netherlands' Queen Maxima and Denmark's Crown Princess Mary.

The two royals were visiting the carbon-neutral Samsø island, a small speck of land just off Denmark's Jutland Peninsula, and just about managed to hold on to their hats during a blustery ferry ride there.

Thanks to the churning Baltic waves, the two also suffered a wobbly moment as the ferry, called Kalhave, lurched beneath them.

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Hats off to Mary and Maxima! The Dutch and Danish royals were glamorous in matching trilbies